Transmission system for statistical data



Sept. 3, 1940.

J. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Oct. 19, 1938 6Sheets-Sheet 1 lNVENTOR 8 ATTORNEY J. w. BRYCE 2,213,560

Fiied Oct. i9, 1938 6 Sheets-Sheet 2 DWI TRANSMISSION SYSTEM FORSTATISTICAL DATA Sept. 3, 1940. I

ATTORNEY P 1940- J. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FQR STATISTI GAL-DATA Filed Oct. 19, 1938 6Sheets-Sheet 3 E. a. v KT K? aw NJ G. n Fl v *m INVENTO M mmm m m w y m5i 75 a a E 4 h rim F ATTORNEY @NQE p 1940- J; w. BRYCE 2,213,560

- TRANSMISSION sYsT'Eu FOR STATISTICAL Imm- Filed Oct. 19,- 1938 sSheets-Sheet 4 FlG.2b.

g BY

a ATTORNEY Sept. 3, 1940. J. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Oct. 19, 1938 '6Sheets-Sheet 5 r IIWIHH llllllillll O0OOOOOOOOOOOGOOOOOKQOOOODO INVENTOATTORNEY Sept. 3 1940. .1. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Oct.- 19, 1938 6Sheets-Sheet 6 IIIIIIIIIIIIIIIIIA lllll-lllllllrWI/I/I/II/IIIIIIII/I/I/l/III/IA v a: s 77- A\\\\\\\\\\IIIIII/IIIIIIIIIII 7 8 7.9 lNVENTOR ATTORNEY Patented Sept. 3, 1940PATENT OFFICE TRANSMISSION SYSTEM FOR STATISTICAL DATA James W. Bryce,Glen Ridge, N. J., assignor to International Business MachinesCorporation, New York, N. Y., a corporation of New York ApplicationOctober 19, 1938, Serial No. 235,821 8 Claims. (01. its-2) Thisinvention relates to transmission systems for statistical data and moreparticularly to systems of the type which provide verifying means at aprimary station for data recorded at a remote secondary station. Oneform of such a system is disclosed herein, another form being shown inmy ccpending application Serial No.

235,819, and still another form'being shown in my copending applicationSerial No. 235,820.

Transmission systems with check-back means for the data received at asecondary station are old, a considerable number of difierent methodsbeing known at the present time, but in a great majority of thesesystems it is possible for the data received at the secondary station todificer from the data actually recorded at the latter station so that,even though the system checks as to the data received, the'recorded datamay be in error and this error remain unnoticed.

It is therefore an object of the present invention to provide'datatransmitting means at a first station for effecting the reception andduplication of said data at a second station and novel comparing meansunder direct control of the duplicate data for comparing such data withthe original data transmitted at the first station. Thus, by having acomparing means controlled directly from the recorded data a greaterassurance of the accuracy of the system is provided.

According to the present invention, a contact control key at a station Ais operated to send out a series of impulses which cause a record cardto be fed into a punching position at a 35- station B, located at adistant point from station A. Then, upon depression of a character key,printing of the corresponding character is effected at station A, and atthe same time a series of impulses are sent to station B to 40 cause theenergization of a chain of relays there to a predetermined extentdependent upon thecharacter transmitted. These relays control theoperation of means for printing and punching the character at station B.The character is punched in a column of a record card. Other charactersare transmitted in-a similar'manner and are punched in different columnsof the record card which. are successively presented at the punchingstation. After the card is completely punched in its data-receivingcolumns, it is fed past an analyzing station where it is analyzed columnfor column and multiple impulses representing the characters punched ineach of the columns are retransmitted to station A. At station A, thisdata is received and printed to provide a visual check against thepreviously printed data at station A. If there is an agreements. newrecord card feed and carriage return is initiated. If there is noagreement, an adjusting key at station A is depressed to adjust stationB and also visually to indicate at that station the failure of there-transmitted data to verify. At station 13 the newly punched recordcard is removed and, after station A has adjusted 3, station B adjustsA. Operations are then resumed as before. The importance of having anaccurate check-back on the transmitted data as described above,especially in statistical work which deals primarily with numericalvalues, is well realized by those familiar with the art. I

Further objects of the instant invention reside.

in any novel feature of construction or operashown in the accompanyingdrawings whether within or without the scope of the appended claims andirrespective of other specific statements as to the scope of theinvention contained herein.

In the drawings:

Figs. 1 and 1a are representative circuit diagrams of the transmitterand receiver respectively at station A.

Fig. 1b is a timing chart for the circuit diagram shown in Fig. 1.

Figs. 2 and 2a are representative circuit diagrams of the receiver andtransmitter respectively at station B. 5

Fig. 2b is a timing chart of the circuit diagram shown in Fig. 2a.

.Fig. 3 is a plan view of a portion of the transmitted keyboard.

Fig. 4 is a sectional view taken at 4'4 of Fig.3.

Fig. 5 is a sectional view taken at 5-5 of Fig. 3, showing atransmitting key and the various operating mechanism associatedtherewith.

Fig. 6 is a view of the dash pot control mechanism which is applied tocertain relay contacts in the various circuits of the system.

Fig. 6a. is detail plan view of the mechanism associated with the'dashpot.

Fig. 7 is a vertical section taken through the analyzing, punching andcard feeding mechanism of the punching machine.

A preferred embodiment of the invention wi now be described withreference to the accomor series of impulses.

Seven keys are shown as representative, three of them being allotted tonumerical characters and the remaining four being provided for variouscontrol operations such as space control, card feed,- verifying, andadjusting. If more than three different numerals are to be transmittedmore numeral keys are added, but the four control keys are sufficientregardless of an increase in the numeral keys. Depres: sion of any ofthe keys causes the operation of a special set of contacts associatedtherewith so as to initiate a corresponding impulse If a numeral key isdepressed, it also causes printing of the numeral by energizing a printsolenoid associated therewith, all of which will be described in detailhereinafter. The mechanism illustrated in Fig. 5 in association with theadjust key I! is similar to that for the other keys. It is seen .thatthe depression of key I! causes an insulated conducting portion [1a. tobridge the contact springs l'lb. A notched projection no at the sametime cams latch bar H! to the right and then allows it to return to theleft again under spring action so that the left extremity of bar I9 ispositioned above the latch point on projection l'lc to hold the keydown. Then at a later time, as will be described later, solenoid l8becomes energized momentarily to move the latch oar 19 to the right awayfrom projection He, thus releasing the key I! and allowing it to raiseto its normal position under the urging of its return spring l'ld. Itwill be noted that only one key may be depressed at a time due to thepresence of locks 9 (Fig. 4). When a key is down it maintains the locksadjacent thereto spread apart so that the combined clearance of thelocks 9 is taken' up and no other key may be moved down between them.This structure is elementary and similar to that used in key.- operatcdpunches to prevent the operation of more than one key at a time so thatno further description is believed necessary;

A transmitter commutator 20 (Fig. 1) and a .rotatable arm 2| are alsolocated at station A, arm 2| being maintained continuously rotating in aclockwise manner at uniform speed by any suitable means such as anelectric motor (not shown). The speed at which this arm is to rotate isdetermined by two factors; namely, the desired speed of transmission ofthe impulse and the speed of functioning of the receiver mechanism atstation B. An arm 2| traverses the various transmitting segments of thecommutator 20, aplurality of circuits are successively closed dependingupon which of the keys H to I! was operated to effect the transmissionof a predetermined number of impulses from the transmitting device 43.The circuits will be described in detail later.

The mechanism actuated at the receiver of station B by the incomingimpulses comprises a chain system of multiple contact relays Rl to B!(Fig. 2) which control the selective energization of a plurality ofprint solenoids, such as the one designated 62 for example. Solenoid 82,upon becoming energized, pulls its armature 62a and the key leverconnected thereto down so as to operate a printing mechanism which isdiagrammatically represented by a platen 51, a hammer 51a, and suitablelinkage 5'"; connected between the hammer and the key lever. Motiontransmitted through the linkage 51b causes the hammer to be moved towardthe left to strike the platen. The leftward movement of the hammercloses a contact 6222 to energize a punch solenoid 12 by a circuit to bedescribed later. Punching mechanism of any convenient type such as shownin the U. S. Patent No. 1,772,186 to F. L. Lee et al., for example, maybe employed. Printing and punching under solenoid control are old in theart, and therefore the representation of the printing and punching meansillustrated in Fig. 2 and Fig. 7 respectivetively are believedsuificient.

After the record card has been completely punched it is re-fed into thepunch and is permitted to move out again column by column during whichmovement it is analyzed for the character perforation therein. Theanalyzing station is located just beyond the punch die and comprisescontact balls 22 (Fig. 7) mounted in an insulating support andspring-pressed towards the card C. Above the card there is a contactblock 23. It is understood that, when a perforation passes over one ofthe balls 22, that ball is urged upwardly by its spring to establishcontact with the contact block 23.

In order that the re-feeding of the card for analyzing purposes may beeffected properly, it becomes necessary to suppress the feeding of a newcard into the punch at this time. The mechanism shown in Fig. 8 istherefore provided. The magnet "H becomes energized when the card hasreached the last column. After the last column is analyzed, the feedstroke occurs as will be explained later but lever 18 cams down the cardfeed knife edge 19 so that it fails to feed a new card C. After the feedstroke, magnet H becomes deenergized and the card feed knife 19 raisesto its normal operating position.

A device for retransmitting multiple impulses to station A to representthe character perforations in the record card in turnas they areanalyzed at station B comprises a commutator 24 with a rotating arm 25and a transmitter station having dash pot mechanism generally designated54 (Fig. 6.) associated therewith to control the time of operation of aplurality of sets of contact including those designated 55b,

55c, 55d, and-55c. Relay coil 55, upon becoming energized attracts thearmature 5 so that a cylinder 5a attached to the right extremity of thearmature is moved down forcing air out through an opening I in the dashpot 54. It is seen that the speed of closing of contacts 55b, 55c, 55d,and 556 are dependent upon the size of the open-- ing I which isadjustable in a manner to be explained presently. When the relay coil 55is deenergized, the outside air rushes in through the opening 8 and thearmature is allowed to restore quickly under spring action and returnthe above contacts to their normal position.

The size of the opening I is manually adjustable by turning knob 6 whichis fixed to a threaded shaft 6. Automatic means for rotating the shaft 6in either direction is also provided so as to speed up or slow down theclosing of the contacts under control of the dash pot mechanism. Atrain. of gears, generally designated 4, connects the shaft 6 foroperation by a differential device 66 actuated by a pair of pawls 9|, 92and, ratchets 66a, 66b. Theshaft 6 forms a frictional mounting for oneof the gears of the above train. The ratchets may be locked or releasedaccording to the position of a pair of cooperating detents 2 and 3. Thedetents are n'ormallyin the position shown in the drawings and aremounted on a common shaft l. A solenoid X controls the engagement anddisengagement of the detents. When detent 2 is disengaged from ratchet66o, detent 3 is engaged in ratchet 661). A magnet I35, when energized,causes the pawl 9| to feed. ratchet 66b clockwise one tooth. A magnetI36 cooperates with pawl 92 to feed ratchet 66a counterclock- Wise onetooth. The manner in which these magnets are energized will be betterunderstood later from the description of the circuits of the system. Itis sufficient for the present to state that the stepping of ratchet 56bin a clockwise direction causes the threaded shaft 6 to back up bymotion transmitted thereto through. the gear train 4 and allow anincrease in the size of opening 1. On the other hand, thecounterclockwise movement of ratchet 660, causes motion to betransmitted through the gear train 4 to turn shaft 6 clockwise therebydecreasing the size of the opening 1. Thus, ratchet 66b'is operated inthe direction indicated by the arrowto speed up dashpot action andratchet 65a is operated to slow down this action. The solenoid X islocated in series with magnet I36 and is energized when the latter isenergized so as operation.

to release the-ratchet 66a. Ratchet 66b is normally free of detent 3 sothat solenoid X need not be operated upon the operation of magnet I35.The purpose of the dash pot control mechanism and the automaticadjustment therefor will be explained in connection with the explanationof the circuits and operation of the sysof fresh record cards in itshopper, and that.

the two stations are in adjustment which is described later. It is firstnecessary to feed a card from the hopper between the die and stripper ofthe punch to a punching position. This is accomplished by transmissionof a predetermined number of impulses from station A to station B. Theseimpulses cause the energization of a selected control magnet of thechain relay system already described which in turn causes the punchclutch magnet to be energized in a manner to be described presently; Akey l5 (Fig. 1), referred to as the card feed key, is depressed (seeFig. 5 and Fig. 1-) to initiate the above The depression of the cardfeed key l5 causes conducting portion |5a to bridge contact springs |5band complete a circuit to connect relay coil 35 directly across theline. Relay 29 also becomes energized by .a circuit from right handwhich carries arm 2|.

now rotates in synchronism with the arm 2l' period (see timing diagram,Fig. 112).

line 26. The energization of magnet 40 causes .the cam associated withcontacts CC3 to be clutched in for rotation with the same shaft Cam CC3therefore from the D" positiononward. Near the end of the next cycle,the cam causes-the closure of its contacts CC3 for a purpose which willbe explained later. here that the depression of any of the keys H to Hcauses the clutching in of the CC3 cam to the commutator shaft and theenergization of relay coil 29.

The energization of relay 35 upon depression of the card feed key l5causes the closing of contacts 35a and 0-47. A circuit is completedthrough contacts 35a at the time arm 2! con tacts segment 20a of. thecommutator 20 in the following manner: from line 21, wire 28 to contacts35a now closed, relay coil 39, contacts 39b,

It might be well to mention above circuit, closes its contacts 30a tocause the energization of relay 'coil 38 from line 21, contacts 30a,relay coil 38, to line 26. The holding circuit for relay 38 is throughcontacts 38a now closed and cam. contacts CC|.- As previously mentioned,the CC cams are driven at the same speed as arm 2|, and when the arm 2|is at line D of commutator 20, the CC cams are in the well known ,Dposition as illustrated inthe timing diagram (Fig; 1b). Relay 38 isprovided with contacts 38b which are located in series with thetransmitter 43 and are normally open. Thus, it

is. seen that transmission may be effected only when the energization ofrelay coils 30 and 38 has occurred previous to the passage of arm 2|over the various transmitting segments of the commutator 20.

With relay 38 energized, a series of impulses may now be transmitted.The transmitting cir-. cuit is from line 21 through resistance 4|,contacts 38b now closed, wire 42, contacts 359 now to line 26. The flowof current through resistance 4| causes a potential drop across it whichis impressed upon the input of the transmitter 43 to cause an impulse tobe sent out from station A to station 13. Relay 45, upon being energizedby the previously traced circuit, closes its contacts 45a to energizerelay coil 44 from line 21, through relay contacts 45,through relayclosed, relay coil 45, segment spot 29b, arm 2|,

coil 44, to line 26. Relay coil 44 is then held 4 energized through itscontacts 44a and cam contacts CC2 until the end of the transmitting Asthe rotating'arm 2|-successively contacts the segment spots 20c, 20d,Zoe, and 201, additional impulses aresent out from transmitter 43. Inthis case, that is, where key I5 is depressed, the contacts 350 through359 cause transmission of impulses, five in number. Assuming the key l5has been released by the operator, it is still held in a down positionby latch I9 in a manner already described for key l1.

Following the transmitting portion of the cycle,

,a circuit is completed to energize relay coil 39 by means of the arm 2|from line 26, through arm 2|, through segment spot 2012, throughcontacts 4417 now closed, relay coil 39, to'the other side of the line21. Relay coil 39 is held energized through its contacts 39a and relaycontacts 29b now closed. The energization of relay coil 39 by (the abovecircuit opens its contacts 39b and prevents energization of the relaycoil 30 should the key I5 remain depressed for another machine cycle.This effectively prevents transmission of a repeated series of impulsesfor the same depression of the key. Key I5 is released near the end ofthe cycle when cam contacts CC3 close to energize relay I8, which shiftslatch I9 (Fig. 5) to permit key I5 to move upward under spring action inthe same manner as illustrated for key I1. If the operator, however, hasnot yet released key I5, the shifting of latch I9 has no effect andmagnet 40 remains energized due to continued closure of relay contacts29a. Once the operator removes pressure from the key, however, the nextshifting of latch I9 will release key I thereby deenergizing relay coil29 and consequently relay coil 39. Relay contacts 3% then are allowed toclose once more and, upon the next key depression, a new series ofimpulses may be transmitted.

The five impulses transmitted in the manner just described are receivedat station E and effect a card feed there asfollows: Upon reception ofeach impulse at station B (Fig. 2) the receiver 50 is actuatedaccordingly and causes the energize.- tion of relay coil 52 for eachimpulse. Coil 52 closes its contacts 52a upon each energization. Thefirst impulse completes a circuit from line 46, relay contacts 52a nowclosed, through center and-upper relay contacts 5Ia, RIb, R25, etc.,through R11), wire 49, relay coil 5|, and back to the other side of theline 41. Relay coil 5| then shifts its make before break contacts 5| a,that is, the center and lower contacts make before the center and upperbreak.v Coil 5| thus remains energized for the duration of the firstimpulse through relay coil 52. Contacts 5Ib close and cause theenergization of relay coil RI from the left-hand side of line 46,through contacts 53a,

contacts 5Ib, contacts RIa, relay coil RI, to line 41. Relay coil RI ismaintained energized through contacts -R2d, the holding circuit beingfrom line 41. relay coil RI, contacts RIa, relay contacts R2d, contacts53a, to line 46. The contacts RIa. are also of the make before breaktype. Relay contacts 5Ic also close to cause the energization of relaycoils 55 and 55' by completing a circuit from line 41, relay coils 55and 55 in parallel, contacts 5|c now closed, ,to line 46. The holdingcircuit for these coils is through contacts 55'a, 60, 6|, 53b, and 63a.

A plurality of contacts are operated under the control of relay coils 55and 55'. Those operated by coil 55, including contacts 552), 55c, 55d,and 556, are provided with dash pot control mechanism as alreadydescribed. Contacts 55'a and 55'f, which are operated by relay coil 55',are not dash pot controlled. The purpose of the dash pot is to preventany one of the chain relays from being energized to effect control untilthe completion of the time during which all possible signal impulseshave entered the chain relay group. Accordingly, the adjustment of thedash pot is such that contacts 551) do not close until the arm shiftingof the RM contacts, which are of make before break type previouslydescribed, transfers the holding circuit for relay RI back throughcontacts 5211. Therefore, upon opening of these contacts, relay RI isdeenergized. Relay R2 is held energized through contacts R2a and R3d. Ina similar manner each successive impulse entering the chain causes anenergization of a new relay and deenergization of the previous one. Whenthe five impulses representative of a card feed are all received, relayR5 is energized to manifest this fact. Shortly thereafter relay contacts55b close and a circuit is completed as follows: from line 45, relaycontacts 555, switch 56 now closed, contacts Rlc, R20, R30, and R40 inthe position shown, contacts R50 now in a shifted position, solenoid 61,to line 41. This circuit energizes solenoid 61 causing it to pull downits plunger 51a and to close its contacts 61b. The closing of contacts61b completes a circuit to energize relay coil 68 as follows: from line46, relay coil 68, contacts 61b, to line 41. The depression of plunger61a also closes contacts 610 causing relay coil 53 to become energizedby a circuit from line 41, contacts 610, relay coil 53, to line 46.Relay coil 53, upon energization, opens its contacts 53a to deenergizerelay R5, and also opens its contacts 53b to deenergize relay coil 55.With the energization of relay coil 68, contacts-58a close to complete acircuit from line 46, through contacts 68a,

through the punch clutch magnet 1B and back to the right-hand side ofline 41. Energization of punch clutch magnet 10 shifts contacts 69 toenergize the punch motor 65 by completing a circuit thereto from theleft-hand side of line 46, through contacts 59, through motor 65, andback to line 41. The punch motor 55 then operates to eflect the feedingof a new record card to the punching position.

Station B is now ready to receive the impulses representative ofstatistical data from station A. One of the digit keys at station A, forexample, key I2 (Fig. 1), is now depressed and closes its associatedcontacts I2b in a previously described manner to effect the energizationof the relay coil 32. The closure of contacts 32b then completes acircuit from line 26, through contacts 325 now closed through typewritersolenoid S2 and back to the right-hand side of line 304. Energization ofsolenoid S2 causes printing of the numeral 2 at station A. Closure ofcontacts 32a causes a pickup of relay 30 and also relay 38 as previouslydescribed so as to prepare the transmittingcircuit. Closure of contacts32c and 32d then permits transmission of two impulses from station A tostation B, the transmission of these impulses being effected in the sameway as for the card feed impulses.

At station B, upon reception of the two impulses, relay coil R2 becomesenergized and, at the time dash pot contacts 5517 close, a circuit iscompleted from the left-hand side of the line 45, through contacts 555,receiving switch 56 now closed, through contacts RIc in position shown,through contacts R20 in a transferred position, through solenoid 62, toline 41. Plunger 62a is pulled down to effect printing, on the sheet andplaten 51, of the numeral 2. Contacts 620 now close to energize relaycoil 53 in a previously described manner. Contacts 62b, in closing,energize relay coil 12 by completing a circuit as fol-.

lows: from line 46, escapement contacts 58, interposer solenoid 12,contacts 62b, to line 41. Interposer solenoid I2, upon beingenergizechcloses interposer contacts 14 to energize the punch magnet bya circuit from the line 46, latch contacts, 88 in the position shown,punch magnetll5, interposer contacts I4, to line 41. In the wellknownmanner the energization of punch magnet I5 causes the punching of thedigit 2 in the record card.

The punching impulse is effected in the first column of the card in thepunching position. A skip bar may or may not be used as desired. If noskip bar is used the card is spaced column by column to a. firstpunching position in a manner which is explained later. Energization ofthe punch magnet 15 causes the depression of the usual punch motor baron a punch which punches the record card and permits it to move forwardone column ready to receive a new perforation. The record card ispunched accordingly column by column out to the last data-receivingcolumn. It

, is then shipped to the actual last column position where it remainsbecause the ejection operation, normally following the moving of thecard in the last column position, is rendered inefiective at this timeas will be explained later..

The next step in the sequence of events is to cause a re-feeding of thejust-punched card into the punch in order that the perforations thereonmay be analyzed forveriflcation purposes.

* so-called verify key I8- at station A (Fig. l) to send out a seriesofsix impulses to effect the energization of relay R6 at station 13(Fig. 2) in the same manner as already described for the transmission ofcharacter impulses. As a result of relay R8 being energized, whencontacts b close a circuit is completed to energize solenoid I82.Contacts I82b then close to pick up coils I88 and. 89. Coil I88 is heldenergized through its I88a contactsand the eject contacts 81, but

coil 88 is energized only momentarily to close contacts 880 and energizethe card feed knife controlmagnet 11 which is then held through its Ilacontacts, which are closed by lever 18,

and rack contacts 84 in the normal position.

The card feed knife is deflected downwardly in a manner alreadydescribed to preventthe feeding of a new card at this time. .,When thearmor ture lever 18 has depressed the card feed knife suiiiciently tolower it below the plane of the card which it would ordinarily feed,contacts 88 also closed to provide .a circuit to energize "the punchclutch magnet 18. The energization of the clutch magnet 18. causes theshifting of contacts 88; to energize the punch motor85.

feed racksup toward the punching position. The card which has just beenpunched but not ejected is thereby carried'back into the punch by onerack, and, the card feed knife having been deusual fresh card. Near theend of the feed i stroke, rack contacts 64 are shifted to break theholding circuit to magnet .I'i. At that time punch clutch-contacts 69are trippedback to normal to deener'gize the punch motor 85. Theinst-punched card has now been fed back into thepunch so that the firstcolumn is aligned in the punching position. It is now necessary toconditioncircuits for analyzing the perforations in the card, column bycolumn. A circuit must firstbe completed to the contact roll as (Fig.2a) in the following manner. Relay coil 58 (Fig. 2) becomes energized atthe end of the feed stroke described above through the shifted rackcontacts 68 and This is accomplishedby-the depression of the When thepunch motor operates, it moves the fiected down, the other rack fails tofeedin the contacts I030 now closed. .The holding circuit for coil 59 isfrom line 41, coil 58, contacts 59a now closed, last column contacts 18now closed, to line 46. Relay contacts 59b (Fig. 2a) close to provide a.circuit tothe roll 23. A portion of the card is insulating the roll 23from the analyzing contact balls 22 at this time, so that no currentpasses through the roll 23.

As the analyzing station is located one col-' umnaway from the punchingstation, it is necessary to provide an, automatic spacing of one columnso that the re-fed card is moved into a position where its first columnis at the analyzing station. To accomplish this, a circuitis completedwhen commutator arm 25 engages segment, spot 2472. as follows: from line48, contacts I831) now closed, escapement contacts 58, commutator arm25, segment 2471., relay coil 85, contacts 59c now closed, contacts 88c,relay coil 88, to line 41. Contacts a (Fig. 2) close upon energizationof coil 85 to energize the punch space control magnet I88 by a circuitfrom line 41, conductor I I5, contacts 8511 now closed, punch spacecontrol relay I88, to line 46. When relay I88 becomes energized,contacts I-Illlbclose to energize the punch magnet 15 to allow the cardrack to escape one column. The first column of the card is then inposition to be analyzed. The position of the-perforation in this columndetermines which one of, the analyzing relays M to 84 are energized.Assuming a "2 hole is being analyzed, relay 82 will become energized bya circuit from line 41, contacts 5% now closed, contact roll 28, throughthe hole in v the card, relay coil 82, to line 46.

' Coil 88, which was energized as described previously, is held throughits 85a contacts and CC8. Then, when contacts CC-Ill' close, a circuitis completed from line 46, conductor 98. contacts 8811. relay coil 88,to line 41 The hold- :ing circuit ion coil 88 passes through contacts881:, now closed, and the eject contacts H6. Contacts 880 open toprevent further energization of coil 88 after cam contacts CC-Q open.Also, with contacts 88b now closed,-a circuit is completed when thecommutator arm 25 engages segment spot 249 as follows: from line 48,contacts I881) now closed, escapement contacts 58' in the normalposition, arm 25, segment 249, contacts I28b also in the normalposition, contacts 88b now closed, contacts 58o now closed, relay coilI88, to line 4'5. Relay coil I88, upon'becoming energized, is held inits operated condition through contacts I88a now closed and CC 'I.

The circuit for retransmitting impulses to station A is now provided inthe following manner: from line 48. contacts I88!) now closed, contacts58' in the normal position, arm 25, segment spot aand then segment spotb, contacts 8": and then contacts 821), contacts IIl8cnow closed, relaycoil I24, contacts I200 in the nor-- mal position, resistance II2, toline 4?. The potential drop across resistance II2 provides bias totransmitter Bfor sending impulses to station 'A for efl'ecting acomparison of the character represented by the retransmitted impulseswith the original character'recording at station A. a With a "2 holeinthe card at station B, an impulse is sent out when arm 25 engagessegment 28a and again when this arm engages segcapement contacts duringthe feed'of the card to the first analyzing position. As arm retatesfurther and arrives at segment spot 24f, it provides a circuit throughrelay contacts 'I08e now closed, contacts 810, and relay coil 89, toline 4I. Contacts 89a (Fig. 2) close to energize the punch" spacecontrol magnet I00 to cause the record card in the punch to be spacedfor analyzation of the next column. Relay coil I08 (Fig. 2a) becomesenergized once again in the manner previously described and a new seriesof impulses representing the perforation in the newly analyzed column istransmitted back to station A.

When a blank column. of the card is presented at the analyzing station,a spacing signal comprising a series of four impulses is initiated aswillnow be explained. After relay coils 81 and I08 are energized in thepreviously described manner, the commutator arm 25, in passing oversegment spots 24a to d, fails to complete a circuit to energize therelay coil I24 because none of the analyzing, relay contacts "b to 84bare closed at this time. The fact that coil -I24 remains deenergized,contacts-[24a remain closed to maintain relay coil 81 energized. Thus,when the commutator arm ngmssegmenz spot 24ee,

a circuit may be completed't'h'rough contacts "Md and 81b now closed,through relay coil I22, to line 41. Contacts I226 now close to energizerelay coil 84 which in turn cause relay coils 83, 82 and ll to alaobecomeenergized by parallel circuits created by the closing of contacts84a, 83a, and 82a in succession. Accordingly. with contacts Olb to b nowalso 'closed,'.four impulses are successively transmitted by the nextpassage of the commutator arm 25 over the segments 24a to d. Receptionof the four impulses at station A is indicative of the blank space inthe column of the card at station lyzed.

Upon the-completion of transmission of the character impulses and spaceimpulses for all columns of the card back to station A, the ejection ofthe card occurs following the operation of the last column contacts I6and IIII. Contacts I6 open to deenergize relay coil 59. The pickupcircuit to a coil I26 is thus broken by the opening of contacts 59a,although the holding circuit for that coil remains intact through con- Bwhich was just anatacts 126a now closed and ejectcontacts I I5, the

coil I26 having been energized at the time the energization oi relay i158 caused the. closing of contacts 599. with clay coil I26 stillenergized its contacts I26b remain closed, and when last column contactsI III close, a circuit is completed to energize the stacker magnet I05to eject the card.. The energization 'of the stacker magnet opens ejectcontacts H5 to deenergize relay I26. Eject contacts 91 (Fig. 21) arealso operated at this time to deenergize the verifying control magnetI03.

Reception of the verification impulses at station A effects.the pickupof the correspondingrela'ys-RI through Rt (Fig. la), depending upon thesignal impulses transmitted. Ina manner similar to that described forstation B, energization of these 'relays and subsequent closure of relaycontacts 55b effects printing of the proper character at station A. Thereception of four impulses energizes the space magnet I30 to effect aspacing operation. The relay 53 at station A is energized after printingoccurs and relay contacts 53a eflectthe reset of the chain relay systemas previously described. The operator at station A now compares theprinted data which was originally transmitted with the printed datawhich has just been received. If this data verifies, the operatordepresses the card feed key l5 (Fig. 1) and printing and punching for anew record are effected. If the card fails to verify, the adjust key I!is depressed and causes a pickup of a green or red signal at station B.The signal circuits will be explained later. Such a signal at this timeindicates to the B operator that the card failed to verify andaccordingly the just punched card is removed. Adjustment is then made ina manner to be described presently. A new series of operations thenensues for the same data' and if this also fails to verify, it isunderstood that the machine is in need of repair.

In starting up and at various times it is necessary to adjust thedash-pot controls at both of the stations to insure proper timing ofcertain circuits associated with the receiving chain of relays. Thepresent transmission system requires one or. more of a series ofimpulses to effect transmission of statistical data as alreadydescribed. Eachimpulse of this series energizes a corresponding relayand causes deenergization of the one just preceding it. Because of thisthe pot controlled must close within a period deter-' mined by the speedof rotation of the transmitting commutator at station A. That is, thefirst of a series of impulses triggers off the dash-pot relay 55. Thecontacts controlled by this relay must not function before the time haspassed when the last possible transmitting signal impulse might bereceived from station A.

Therefore, since the first impulse from station A triggers oil thedash-pot relay at B, if the time of closure of these points is checkedby an additional impulse following the time of signal impulses, it ispossible to determine if the adjustment is correct or not on thedash-pot relay. Means is provided to automatically effect correctadjustment at station B by the, signal of adjustment from station A andlikewise station 13 to A. For the machine to be in adjustment, thecontacts 55b must close following the completion of the signal impulsesand while the arm 2| at station A is contacting segment spot 20m.

When starting up sending operations, for example, each morning prior tobeginning transmission, the operator at station A begins the adjustingoperations. Operator at station A dc, presses the adjusting key I! andoperator at B opens receiving switch it prior to adjusting to preventprinting. Depression of key 11 effects not provided with the usualholding circuit through contacts at station B. Hence, relay R1 isenergized only while thefarm 2| contacts segment 20m. If contactsilcclose while relay R1 is energized, the dash-pot control. (Fig. 2') isin adjustment, and a circuit is completed as follows: line 46, relaycontacts 550 now closed, relay contacts RIe now closed, contacts I3Ic,coil I33, to line 41. Relay I33 upon energization is held energizedthrough its points I33a and relay con tacts 5Id and I201. Relay contacts133a, in closing, light a green lamp in the holding circuit whichinforms the operator at station'B that his machine is in adjustment.Also, relay 63 is energized to open its 63a contacts and drop relay 55.Operator at B would then begin sending an ad justing impulse to stationA to operate similar circuits at the latter station in a manner to bedescribed shortly.

If the dash-pot control at station B is too rapid, the sequence ofevents is as follows: The contacts 55e become closed before theadjusting impulse opens contacts RIg and relay coil I3I is energized bya circuit from line 46, contacts 556, contacts RIg, relay coil I3I, toline 41. Relay coil I3I is held energized through contacts I3Ia andcontacts 5Id and I20 Contacts I3Ib close to energize relay coil I32 whenRIh closes, coil I32 being then held through contacts I320, 5Id andI20r.Relay contacts I32a, in closing, light a red lamp in the holding circuitto show that the adjustment is not correct.

If the dash-pot control at station B is too slow, contacts R'If open andclose before contacts 55d open and thus relay coil I34 -is energized.Also, coil I3I is energized, but coil I32 is not energized at this time.A red light in the holding circuit indicates machine is still.- out ofadjustment. The energization of coil I 34 automatically efiects anadjustment of the dash-pot mechanism to speed up the relay action byclosing points I30b and energizing the adjusting magnet I35 (Fig. 2a)which causes shaft '6 (Flgr' 6a) to rotate counterclockwise to effect aspeeding up of the dash-pot action by increasing the size of the openingI as has been previously explained. Closure of I32b points energizesmagnet I36 to slow up the dash-pot action by causing a clockwiserotation of shaft 6.

To transmit an adjusting impulse from B to A the adjust key I04 isdepressed to energize relay coil I20 (Fig. 2). Relay I20 is thenheldthrough its contacts I20a and normally closed contacts I38d inparallel with CC6. The I20e contacts (Fig. 2a), in closing, cooperatewith the shifting of contacts I20b to provide a circuit for picking uprelay coil I38 when arm 25 contacts spot 249. The I38b'contacts thenclose to provide for transmitting the adjusting impulses through thecontacts I201; 7, h, k, m, and the transferred contacts I200. An impulsecircuit may be traced as follows: from line 41, resistance II2, contactsI200 in a shifted position, contacts I382) now closed, contacts I20),I20g or I20h, etc. now closed, corresponding commutator segment 24a,24b, or 240, etc.,' arm 25, contacts I206 to line 46. The last impulseoccurs when arm 25 is on segment 24e and effects adjstmuent at A in amanner similar to that already described for station B.-

The operator at A seeing his adjusting lights flashing knows station Bis in adjustment, and that he may discontinue transmission of hisadjusting signal to station B; Station A being in adjustment, theoperator there sends back ,a

single adjusting impulse to station B which indienergized and opens its5Id points, or when contacts I 201 open upon sending an adjustingsignal.

Relay coil I20 (Fig. 2) is held energized through contacts I38d and CC-Bin parallel.

circuit of coil 55 is open, and it is necessary therefore that coil 5|,when energized, remains in its operated condition long enough to dropcoil 63. Coil 5| is then deenergized in a previously described mannerand its contacts 5Ic close to pick up coil 55 once again.

While there has been shown and described and pointed out the fundamentalnovel features of the invention as applied to a single modification,'

it will be understood that various omissions and substitutions andchanges in the form and details of the device illustrated and in itsoperation may be made by those skilled in the art without departing fromthe spirit of the invention. It is the intention therefore to be limitedonly as indicated by the scope of the following claims.

What is claimed is:

l. A data recording system comprising a first station having therein aprimary recording means to record original data, a primary datatransmitting means, and a data verifyingmeans; in combination with asecond station having duplicating means controlled by the transmitteddata for duplicating the data on a multi-column record, one column ofdata being duplicated in a corresponding column of the record upon eachoperation of, the duplicating means, spacing means controlled by andoperated as an incident to the duplicating means upon each operationthereof to space therecord so as to bring the next data-receiving columnof the record into alignment with the duplicating means, recordanalyzing means for analyzing the columns of the record successively forduplicate data thereon, and a secondary transmitting means controlled bythe analyzing means upon analysis of each data column for operating thedata verify- 7 Contacts CC-6 close before coil I38 is energized to openits contacts I38d, but contacts CC-6 open before ing means directly inaccordance with the analyzed" duplicate data to provide a comparisonbetween the latter data and the original data at the first station.

2. A data recording system comprising a first station having therein aprimary recording means to ,record original data,,a primary datatransmitting means, and a data verifying means; in combination with asecond station having perforating means controlled by the transmitteddata for perforating the data in a niulti-column record, one column ofdata being perforated in acorresponding column of the record upon eachoperation of the" perforating means, spacingmeans controlled by andoperated as an incl,- dent to the perforating means upon each operationthereof to space the record so as to bring the next data-receivingcolumn of the record into alignment with the perforating means, recordanalyzing means foranalyzing the columns ofthe record'successively fordata perforations therein, and a secondary transmitting means controlledby the analyzing means upon' analysis of each data column for operatingthe data verifying means directly in accordance with the analyzed dataperforations on the record to provide a comparison of the latter datawith the original data at the first station.

3. A data recording system comprising a first station having therein aprimary recording means to record original data, a primary datatransmitting means, and a data verifying means; in combination with asecond station having duplicating means controlled by the transmitteddata for duplicating the data on a multi-column record, one column ofdata being duplicated in a corresponding column of the record upon eachoperation of the duplicating means, spacing means controlled by andoperated as an incident to the duplicating means upon each operationthereof to space the record so as to bring the next data-receivingcolumn of the record into alignment with the duplicating means, recordanalyzing means, record feeding means effective upon analysis of thelast column of data in the corresponding column of the record forfeeding therecord into a predetermined position to bring the first ofthe columns of the record to receive the data into operating alignmentwith the analyzing means, means controlled by the analyzing means foroperating the spacing means to present in succession to the analyzingmeans the columns of duplicate data on the record, and a secondarytransmitting means alsocontrolled by the analyzing means upon analysisof each colunm of the record for transmitting the analyzed duplicateback to the first station to operate the data verifying meansaccordingly to compare the latter data with the original data at thefirst station.

4. A data recording system comprising a first station having therein aprimary recording means to record original data, a primary datatransmitting means, and a data checking means; in combination with asecond station having perforating means controlled by the transmitteddata for perforating the data in a multi-column record, one column ofdata being perforated in a corresponding column of the record upon eachoperation of the perforating means, spacing means controlled by andoperated as an incident to the perforating means upon each operationthereof to space the record so as to bring the next data .receivingcolumn of the record into alignment ord having data perforations, and asecondary transmitting means also controlled by the sensing means uponthe sensing of each of said columns of. the record for transmitting thesensed data from the record back to the first station to operate thedata checking means.

5. A data recording system comprising a trans- I mitting station havingtherein a primary recording means to record original data, a primarymeans to transmit primary impulses representing said original data, anddata comparing means; in combintion with a receiving station embracingtherein receiving means-including a plurality of serially arrangedrelays adapted to be energized in succcssion'by and in accordance withthe transmitted impulses, perforating means controlled by the lastenergized relay in the series to perforate the data on a multi-columnrecord, a column of data being perforated in a corresponding column ofthe record upon each operation of the perforating means, recordanalyzing means for analyzing the columns of the record successively fordata perforations therein, and a secondary transmitting means controlleddirectly by analyzing means upon analysis of each data perforation inthe record for transmitting secondary impulses representing said dataperforation to the data comparing means to effect a comparison betweenthe data represented by the latter-impulses and the correspondingoriginal data at the transmitting station.

6. In combination, a transmitting station including therein means totransmit primary impulses representing original data during apredetermined time interval, a primary recording means operated as anincident to and in accordance with the operation of the transmittingmeans to record the original data, and data comparing means; and areceiving station embracing therein means for receiving said impulses,perforating devices controlled selectively by the receiving means inaccordance with the transmitted impulses for perforating a multi-columnrecord, time delay means for rendering the receiving means ineffectiveto operate the recording means until after a time delay corresponding tothe predetermined time interval, analyzing means operable after apredetermined number of columns of the record have been perforated foranalyzing said columns successively for perforations therein, and meanscontrolled by the analyzing means directly upon analysis of eachperforation in the record for operating the data comparing means toefiect a comparison between the data perforated in the record and thecorresponding original data at the transmitting station.

'7. In combination, a transmitting station including thereintransmitting means for transmitting primary impulses representingoriginal data, a primary recording means operated by and as an incidentto the operation of the transmitting means for recording said originaldata, and data matching means ;and a receiving station remote from thetransmitting station comprising receiving means responsive to thetransmitted impulses, perforating means controlled by the receivingmeans for making data-representing perforations in predeterminedportions of a record card, means operable following the reception andperforation of the data for analyzing said portions of the recordsuccessively for said perforations, and a secondary transmitting meanscontrolled solely by the analyzing means and rendered effective uponanalysis of each of the portions of the record for sending secondaryimpulses representing the perforated data therein to the transmittingstation to operate the data matching means to compare the perforateddata represented by the secondary impulses with the original data at thetransmitting station.

8. In combination, a transmitting station including therein transmittingmeans for transmitting primary impulses representing original datacharacters, a primary recording means operated by and as an incidentto.the operation of the transmitting means for recording said datacharacters, and data matching means; and a receiving station remote fromthe transmitting station 'comprising receiving means responsive to thetransmitted impulses, perforating means controlled by the receivingmeans for perforating the data. characters in a record card, cardfeeding means to feed said record to the perforating means, and meansnormally operating said record feeding means at a time following theoccurrence of a predetermined number of perforating operations to feed afresh card to the perforating means, means to suppress the card feedingmeans at this time and concurrently to cause the refeeding of theperforated card, analyzing means adjacent the perforating means foranalyzing the perforations in the latter card successively, and

to the transmitting station to operate the data matching meansaccordingly to compare the data characters from the card represented bythe secondary impulses with the corresponding original data characters.

\ JAMES W. BRYCE.

